Mailing List flyrotary@lancaironline.net Message #57593
From: Bill Bradburry <bbradburry@bellsouth.net>
Subject: RE: [FlyRotary] Failure of an LS-1 D-580 type ignition coil
Date: Sat, 10 Mar 2012 00:48:02 -0500
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>

Fuel not burned in the engine burns in the exhaust.

 


From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of DLOMHEIM@aol.com
Sent: Friday, March 09, 2012 11:23 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Failure of an LS-1 D-580 type ignition coil

 

Tracy wrote:  >As usual, the in-flight symptom was a rise in EGT on the affected rotor.

 

Can someone describe the science behind a "rise in EGT" when we lose a single coil.  I would have expected a drop in EGT due to less thorough burning of the mixture and therefore excess un-burnt fuel which I thought would provide cooler temps of the exhaust stream as it passes the EGT probe.

 

Must be missing something very basic here...

 

Thanks for any clarity!  :)

 

Doug Lomheim

RV-9A / 13B FWF

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